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Llavea
''Llavea'' is a monotypic genus of fern in the family Pteridaceae. The sole species is ''Llavea cordifolia''. It is often cultivated as an ornamental foliage plant. The genus was named in honour of Pablo de La Llave, a Mexican naturalist. Recent cladistic studies have shown that this genus forms a natural group with '' Cryptogramma'' and '' Coniogramme'', a group that is sister to all the other pteridoid ferns. This group has been published as the Cryptogrammoideae, one of five subfamilies of the Pteridaceae Pteridaceae is a family of ferns in the order Polypodiales, including some 1150 known species in ca 45 genera (depending on taxonomic opinions), divided over five subfamilies. The family includes four groups of genera that are sometimes recogni .... References External links * Pteridaceae Monotypic fern genera {{Pteridaceae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pteridaceae
Pteridaceae is a family of ferns in the order Polypodiales, including some 1150 known species in ca 45 genera (depending on taxonomic opinions), divided over five subfamilies. The family includes four groups of genera that are sometimes recognized as separate families: the adiantoid, cheilanthoid, pteridoid, and hemionitidoid ferns. Relationships among these groups remain unclear, and although some recent genetic analyses of the Pteridales suggest that neither the family Pteridaceae nor the major groups within it are all monophyletic, as yet these analyses are insufficiently comprehensive and robust to provide good support for a revision of the order at the family level. Description Members of Pteridaceae have creeping or erect rhizomes. The leaves are almost always compound and have linear sori that are typically on the margins of the leaves and lack a true indusium, typically being protected by a false indusium formed from the reflexed margin of the leaf. Taxonomy Tra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cryptogrammoideae
Cryptogrammoideae is a subfamily of ferns in the family Pteridaceae. The subfamily contains three genera and about 23 species. Taxonomy In the Pteridophyte Phylogeny Group classification of 2016 (PPG I), Cryptogrammoideae is one of the five subfamilies of the family Pteridaceae. Although the subfamily Cryptogrammoideae is similar to the family Cryptogrammaceae proposed by Pichi Sermolli in 1963, that group contained the morphologically similar genus '' Onychium'' (now in the subfamily Pteridoideae ''Pteridoideae'' is one of the five subfamilies of the fern family Pteridaceae. This subfamily contains about 14 genera and around 400 species. Taxonomy Phylogeny The following diagram shows a likely phylogenic relationship between Pteridoideae ...) instead of the less morphologically similar genus '' Coniogramme''. In 2006, Smith ''et al.'' included Cryptogrammaceae as part of the family Pteridaceae, and in 2011, Christenhusz ''et al.'' listed its three genera in Cryptogrammoideae ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pablo De La Llave
Dr. Pablo de la Llave (1773–1833) was a Mexican Catholic priest, politician, and naturalist. He was born to a wealthy family and grew up in Córdoba, Veracruz. After a brilliant university career, he became a teacher in the national college of St. John Lateran and doctor of theology at what was then the University of Mexico. He was a famous preacher and made some translations from Hebrew. He went to Europe and lived for some time in Paris. After this he became deputy director of the Madrid Museum of Natural History under the Bonapartist kingdom. In 1811 and 1812 he assisted José Mariano Mociño in organizing the collections of the Nueva España Expedition (1787–1803) to survey the natural history of Mexico. In 1820 and 1821 he represented the state of Veracruz in the Spanish legislature, where he was a liberal. On his return to Mexico after it declared independence, he held church positions including treasurer of the church at Morelia (then called Valladolid), M ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mariano Lagasca
Mariano Lagasca y Segura (1776–1839), also known as Mariano la Gasca, was a Spanish botanist, writer and doctor. He was the director of the ''Real Jardín Botánico de Madrid'' (Royal Botanical Garden of Madrid). Early life Mariano Lagasca y Segura was born in Encinacorba, Province of Zaragoza, in Spain on 4 October 1776 to a wealthy Catholic family. He studied at the local elementary school and, afterwards, he continued his ecclesiastical studies in Tarragona. During his studies in Tarragona, he developed an interest for medicine and botany. After finishing his studies in Tarragona, he started travelling until eventually studying medicine at first in Zaragoza, and later in Valencia and Madrid. Career In 1800, he moved to Madrid where he met Antonio José Cavanilles, a well-known botanist and doctor and became his disciple. In Madrid, he cooperated in various fields José Demetrio Rodriguez, and co-published with him a botanical book titled Description of certain p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Monotypic Taxon
In biology, a monotypic taxon is a taxonomic group (taxon) that contains only one immediately subordinate taxon. A monotypic species is one that does not include subspecies or smaller, infraspecific taxa. In the case of Genus, genera, the term "unispecific" or "monospecific" is sometimes preferred. In botanical nomenclature, a monotypic genus is a genus in the special case where a genus and a single species are simultaneously described. Theoretical implications Monotypic taxa present several important theoretical challenges in biological classification. One key issue is known as "Gregg's Paradox": if a single species is the only member of multiple hierarchical levels (for example, being the only species in its genus, which is the only genus in its family), then each level needs a distinct definition to maintain logical structure. Otherwise, the different taxonomic ranks become effectively identical, which creates problems for organizing biological diversity in a hierarchical o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cryptogramma
''Cryptogramma'' is a genus of ferns known commonly as rockbrakes or parsley ferns. They are one of the three genera in the Cryptogrammoideae subfamily of the Pteridaceae. ''Cryptogramma'' ferns can be found in temperate regions on several continents worldwide. These ferns have two kinds of leaves which often look so different that at first glance they appear to belong to different plants. The fertile leaves have long, narrow, bumpy segments with undersides covered thickly in sporangia. The edges of the segments may curl back to cover the sporangia, forming a false indusium. The sterile leaves have thinner, wider segments which may be rounded and resemble the leaves of parsley Parsley, or garden parsley (''Petroselinum crispum''), is a species of flowering plant in the family Apiaceae that is native to Greece, Morocco and the former Yugoslavia. It has been introduced and naturalisation (biology), naturalized in Eur .... These ferns grow in rocky areas, often in crevices and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coniogramme
''Coniogramme'' is one of three genera in the subfamily Cryptogrammoideae of the fern family Pteridaceae. A cultivated species, ''Coniogramme pilosa ''Coniogramme'' is one of three genera in the subfamily Cryptogrammoideae of the fern family Pteridaceae Pteridaceae is a family of ferns in the order Polypodiales, including some 1150 known species in ca 45 genera (depending on taxonomic op ...'', is known as "bamboo fern." Phylogeny References *World species list of ''Coniogramme'': https://web.archive.org/web/20090908035159/http://homepages.caverock.net.nz/~bj/fern/coniogramme.htm Pteridaceae Fern genera Taxa named by Antoine Laurent Apollinaire Fée {{Pteridaceae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phytotaxa
''Phytotaxa'' is a peer-reviewed scientific journal for rapid publication on any aspect of systematic botany. It publishes on a wide range of subjects, but focuses on new species, monographs, floras, revisions, reviews, and typification issues. ''Phytotaxa'' covers all plant groups covered by the International Code of Nomenclature for algae, fungi, and plants, including diatoms, fungi, algae, lichens, mosses, hornworts, liverworts, and vascular plants), both living and fossil. The journal was established in 2009 by Maarten Christenhusz and the first issue appeared in October 2009. Authors have the option to publish open access. Abstracting and indexing The journal is abstracted and indexed in Science Citation Index Expanded, Current Contents/Agriculture, Biology & Environmental Sciences, and BIOSIS Previews. See also * Zootaxa ''Zootaxa'' is a peer-reviewed scientific mega journal for animal taxonomists. It is published by Magnolia Press (Auckland, New Zealand). The jou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
